CN215778556U - Sliding pressure locking bone screw - Google Patents
Sliding pressure locking bone screw Download PDFInfo
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- CN215778556U CN215778556U CN202120475341.XU CN202120475341U CN215778556U CN 215778556 U CN215778556 U CN 215778556U CN 202120475341 U CN202120475341 U CN 202120475341U CN 215778556 U CN215778556 U CN 215778556U
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Abstract
The utility model relates to a sliding pressure locking bone screw, which comprises a bone screw and a limiting sleeve. The front end of the bone screw is provided with a thread A, the rear end of the thread A is provided with a polished rod, the rear end of the polished rod is provided with a sliding shaft, a step A is arranged between the polished rod and the sliding shaft, the outer edge of the sliding shaft is smaller than that of the polished rod, the rear end of the sliding shaft is provided with a screw head, a step B is arranged between the screw head and the sliding shaft, the outer edge of the screw head is larger than that of the sliding shaft, the screw head is provided with a thread B, and the screwing direction of the thread B is opposite to that of the thread A. The limiting sleeve is provided with a threaded hole, the threaded hole is matched with the thread B, a step hole is formed in the rear end of the threaded hole, the screw head rotates backwards to pass through the threaded hole, the step hole is formed in the threaded hole, the sliding shaft is arranged in the threaded hole and is in sliding fit with the threaded hole, the step A slides backwards to the limiting sleeve to stop, the sliding distance is set to be 5-10 mm, the rear end of the limiting sleeve is provided with a conical thread, and the conical thread hole is matched with a screw-in bone fracture plate.
Description
Technical Field
The utility model provides a medical instrument, in particular to a sliding compression locking bone screw.
Background
At present, goose head nails or PFAN intramedullary nails are commonly used clinically for treating femoral neck fracture patients, and the two medical instruments have different defects. The goose head nail has the defect that the threads of the bone screws are arranged at the two ends of the fracture line, and the goose head nail has no postoperative pressurizing function, so that the healing of the fracture surface cannot be effectively promoted. PFAN intramedullary nails, while having a postoperative compression function, require manual postoperative compression.
SUMMERY OF THE UTILITY MODEL
The utility model provides a sliding compression locking bone screw, which overcomes the defects. It mainly comprises a bone screw and a stop collar.
The bone screw is characterized in that the front end of the bone screw is provided with a thread A for screwing in the femoral head at one end of a fracture line, the rear end of the thread A is provided with a polished rod arranged at the position of the fracture line, the rear end of the polished rod is provided with a sliding shaft, a step A is arranged between the polished rod and the sliding shaft, the outer edge of the sliding shaft is smaller than that of the polished rod, the rear end of the sliding shaft is provided with a screw head, a step B is arranged between the screw head and the sliding shaft, the outer edge of the screw head is larger than that of the sliding shaft, the screw head is provided with a thread B, the screwing direction of the thread B is opposite to that of the thread A, and the thread B is set to be a rectangular thread. The utility model discloses a bone fracture plate, including spacing cover, screw hole rear end, step hole rear end, screwhead, screw head, screw hole, sliding shaft, stop collar front end, gliding distance is established to 5 ~ 10mm, the stop collar rear end is equipped with the awl screw thread, the awl screw hole of the universal locking bone fracture plate of cooperation screw in coaptation board or the awl screw hole of the open nut of cooperation screw in CN 201595922U. During operation, the bone screw is screwed forwards according to the screwing direction of the thread A, the screw head is stopped at the bottom end of the stepped hole, and the bone screw is screwed in continuously to draw close and pressurize two broken ends of the femoral neck.
Furthermore, the utility model relates to a sliding pressure locking bone screw which mainly comprises a bone screw A and a limiting sleeve A.
The bone fracture screw comprises a bone fracture line A and is characterized in that the front end of the bone fracture screw A is provided with a thread C for screwing in the femoral head at one end of the bone fracture line, the rear section of the thread C is cut off to form a screw rod with the outer diameter smaller than that of the thread C, the bone fracture line is arranged at the position of the bone fracture line, the rear end of the screw rod is provided with a sliding shaft, a step A is arranged between the screw rod and the sliding shaft, the outer edge of the sliding shaft is smaller than that of the screw rod, the rear end of the sliding shaft is provided with a screw head A, a step B is arranged between the screw head A and the sliding shaft, and the outer edge of the screw head A is larger than that of the sliding shaft. Stop collar A is equipped with screw hole A, screw hole A rear end is equipped with the step hole, screw thread C cooperates forward and revolves screw hole A, sliding shaft sliding fit passes screw hole A, screw head A ends in step hole bottom when the forward motion, step hole rear end is equipped with the instrument hole, step A slides backward extremely stop collar A front end, gliding distance is established to 5 ~ 10mm, stop collar A rear end is equipped with the awl screw thread, the locking screw hole of cooperation screw in coaptation board or the awl screw hole of the open nut of the universal locking coaptation board of cooperation screw in CN 201595922U. During operation, the bone screw A is screwed forwards according to the screwing direction of the thread C, the screw head A is stopped at the bottom end of the stepped hole, and the two broken ends of the femoral neck are drawn close and pressurized by continuing screwing.
In operation, two or three or more bone screws are used to connect fractured femur neck with bone plate.
Has the advantages that: through a sliding pressurization locking bone screw, the function of locking the screw is kept, the functions of manual pressurization in operation and sliding pressurization after operation are added, the theory of accelerated healing after the fractured end of the fracture is stimulated by pressurization is met, the purposes of manual pressurization of femoral head and femoral neck in the operation and automatic pressurization of the femoral head and femoral neck after the operation are realized, firm fixation and accelerated healing are facilitated, and through the design of limiting the pressurization distance, the defects of gap increase caused by excessive bone cell absorption at the fracture line part, delayed healing of the femoral head, nonunion and the like are reduced, so that the pain of a patient in secondary operation is avoided.
Drawings
FIG. 1 is a schematic structural view of a first embodiment of a sliding compression-locking bone screw of the present invention.
FIG. 2 is a schematic structural view of a second embodiment of a sliding compression-locking bone screw of the present invention.
Detailed Description
The utility model is further illustrated by the following examples given in connection with the figures.
Fig. 1 is a schematic structural view of a first embodiment of a sliding compression locking bone screw of the present invention, which mainly comprises a bone screw 1 and a stop collar 2.
The front end of the bone screw 1 is provided with a thread A for screwing in the femoral head at one end of a fracture line, the rear end of the thread A is provided with a polished rod which is arranged at the position of the fracture line, the rear end of the polished rod is provided with a sliding shaft 11, a step A is arranged between the polished rod and the sliding shaft 11, the outer edge of the sliding shaft 11 is smaller than the polished rod, the rear end of the sliding shaft 11 is provided with a screw head 12, a step B is arranged between the screw head 12 and the sliding shaft 11, the outer edge of the screw head 11 is larger than the sliding shaft 11, the screw head 11 is provided with a thread B, the screwing direction of the thread B is opposite to that of the thread A, and the thread B is arranged as a rectangular thread. Stop collar 2 is equipped with screw hole 21, screw hole 21 with the cooperation of screw thread B sets up, screw hole 21 rear end is equipped with the step hole, step hole rear end is equipped with the instrument hole, screwhead 12 is passed backward screw the screw hole 21 is arranged in the step hole, sliding shaft 11 locates in the screw hole 21 and with screw hole 21 sliding fit, step A backward slip extremely 2 front ends of stop collar stop, gliding distance is established to 5 ~ 10mm, 2 rear ends of stop collar are equipped with the awl screw thread, the awl screw hole of the universal open nut 3 of locking coaptation board of cooperation screw in CN 201595922U.
FIG. 2 is a schematic structural view of a second embodiment of a sliding compression locking bone screw of the present invention, which mainly comprises a bone screw A4 and a stop collar A5.
The front end of the bone screw A4 is provided with a thread C for screwing into the femoral head at one end of a fracture line, the rear section of the thread C is cut off to form a screw rod with the outer diameter smaller than that of the thread C, the screw rod is arranged at the position of the fracture line, the rear end of the screw rod is provided with a sliding shaft 41, a step A is arranged between the screw rod and the sliding shaft 41, the outer edge of the sliding shaft 41 is smaller than that of the screw rod, the rear end of the sliding shaft 41 is provided with a screw head A42, a step B is arranged between the screw head A42 and the sliding shaft 41, and the outer edge of the screw head A42 is larger than that of the sliding shaft 41. Stop collar A5 is equipped with screw hole A51, screw hole A51 rear end is equipped with the step hole, screw thread C revolves forward screw hole A51, sliding shaft 41 sliding fit passes screw hole A51, only end in step hole bottom when screwhead A42 moves forward, step hole rear end is equipped with the tool hole, step A slides backward extremely the stop collar A5 front end stops, gliding distance is established to 5 ~ 10mm, stop collar A5 rear end is equipped with the coaptation board awl screw thread, the locking screw hole of cooperation screw in or the awl screw hole of the opening nut 3 of the universal locking coaptation board of cooperation screw in CN 201595922U. During operation, the bone screw A is screwed forwards according to the screwing direction of the thread C, the screw head A is stopped at the bottom end of the stepped hole, and the two broken ends of the femoral neck are drawn close and pressurized by continuing screwing.
Claims (8)
1. The utility model provides a slip pressurization locking bone screw, mainly includes bone screw (1) and stop collar (2), bone screw (1) front end is equipped with screw thread A rear end and is equipped with screwhead (12), screw thread A rear end is equipped with the polished rod, its characterized in that polished rod rear end with be equipped with sliding shaft (11) between screwhead (12), sliding shaft (11) outer fringe is less than polished rod and screwhead (12), screwhead (12) are equipped with screw thread B, screw thread B's revolve to opposite with screw thread A, stop collar (2) are equipped with screw hole (21), sliding shaft (11) are located in screw hole (21), sliding shaft (11) and screw hole (21) sliding fit.
2. The sliding compression locking bone screw according to claim 1, characterized in that a step A is provided between the polish rod and the sliding shaft (11), a step B is provided between the screw head (12) and the sliding shaft (11), and the step A slides backwards until the stop collar (2) stops.
3. The sliding compression-locking bone screw according to claim 2, wherein the step A is slid backward by a distance of 5 to 10 mm.
4. A sliding compression locking bone screw according to claim 1, characterised in that the rear end of the threaded bore (21) is provided with a stepped bore, the head (12) of the screw being screwed back through the threaded bore (21) into the stepped bore.
5. A sliding compression-locking bone screw according to claim 1, characterised in that said threaded hole (21) is arranged in cooperation with said thread B.
6. A sliding compression locking bone screw according to claim 1, characterised in that the stop collar (2) is provided with a tapered thread at its rear end.
7. A sliding compression-locking bone screw according to claim 1, wherein said thread B is provided as a rectangular thread.
8. The utility model provides a slip pressurization locking bone screw, its characterized in that includes bone screw A (4) and stop collar A (5), bone screw A (4) front end is equipped with screw thread C, screw thread C back end is cut the crest and is formed the external diameter and be less than screw thread C's screw rod is arranged in fracture line position, the screw rod rear end is equipped with sliding shaft (41), be equipped with step A between screw rod and sliding shaft (41), sliding shaft (41) outer fringe is less than the screw rod, sliding shaft (41) rear end is equipped with screwhead A (42), be equipped with step B between screwhead A (42) and sliding shaft (41), screwhead A (42) outer fringe is greater than sliding shaft (41), stop collar A (5) are equipped with screw hole A (51), screw hole A (51) rear end is equipped with the step hole, screw thread C revolves forward screwhole A (51), sliding shaft (41) sliding fit passes screw hole A (51), ends in step hole bottom when screwhead A (42) moves forward, step A slides backward extremely stop collar A (5), gliding distance is established to 5 ~ 10mm, stop collar A (5) rear end is equipped with the taper thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120475341.XU CN215778556U (en) | 2021-03-05 | 2021-03-05 | Sliding pressure locking bone screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120475341.XU CN215778556U (en) | 2021-03-05 | 2021-03-05 | Sliding pressure locking bone screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215778556U true CN215778556U (en) | 2022-02-11 |
Family
ID=80161899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120475341.XU Active CN215778556U (en) | 2021-03-05 | 2021-03-05 | Sliding pressure locking bone screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215778556U (en) |
-
2021
- 2021-03-05 CN CN202120475341.XU patent/CN215778556U/en active Active
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